Extrusion press run-out table



April 15, 1958 F. KAMENA EXTRUSION PRESS RUN-OUT TA BLE Filed March 1,1954 4 Sheets-Sheet 1 INVENTOR. RED WAMENA HTTOENE Y5 April 15, 1958 F.KAMENA EXTRUSION PRESS RUN-OUT TABLE 4 Sheets-Sheet 2 Filed March 1,1954 April 15, 1958 F. KAMENA EXTRUSION PRESS RUN-OUT TABLE Filed March1,

4 Sheets-Sheet 3 M w/ Y1 r) m E 9G Q N h m & W mm M. w w E l J .\\v 1FRED KAM ENA HTTOENEYS April 15, 1958 F. KAMENA EXTRUSION PRESS RUN-OUTTABLE 4 Sheets-Sheet 4 Filed March 1, 1954' -Y- 13 I) 76 75 W M QINVENTOR- FRED KAMENA 97 7 0 RNE Y5 EXTRUSION PRESS RUN-OUT TABLE FredKamena, Roselle Park, N. J., assignor to The Watson-Stillman Co.,Roselle, N. J., a corporation of New Jersey Application March 1, 1954,Serial No. 413,046

2 Claims. (Cl. 207-1) This invention relates to an extrusion pressrun-out table.

A horizontal extrusion press, designed to extrude metal shapes, mustprovide for moving the die forwardly away from the forward or deliveryend of the press after each extrusion. This is made necessary by thefact that the tail or butt end of the billet must be severed from behindthe die so that the extruded shape and the die may be separated.

Incidentally, the forward end of such a press is the end towards whichthe extrusion moves from its loading or back end. Thus, in Figs. 1, 2,7, 8 and 9, the lefthand end is the forward end and motion towards theleft is forwardly, and the right-hand end is the back end and motiontowards the right is backwardly.

Ordinarily the die holder, which mounts the die backer and die, ismounted on a die-holder carrier which is reciprocative in a directionaway from the forward end of the press. Thus the die holder may be movedbackwardly to locate the die against the end of the container liner, awedge locking the die holder in position during the extrusion.Thereafter, the wedge is removed so that the die-holder carrier may bepulled from the press, carrying the die holder, and, of course, the diebacker and die, away from the press far enough to permit the butt end tobe severed from the balance of the extruded shape.

Because of the above the run-out table, required -to carry the extrudedshape away from the press, must be constructed to provide clearance forthe reciprocative die-holder carrier. Ordinarily the manufacturer of thepress provides a short run-out table which is constructed with thisclearance requirement in mind, the purchaser of the press then providingin the plant a longer run-out table. The present invention is concernedwith the short run-out table which forms, in effect, a part of theextrusion press.

Heretofore such a run-out table has been constructed so that it isoffset upwardly from the table surface leading from it, this permittingthe necessary reciprocative motion by reason of the run-out table ridingover the other surface.

The above type of construction is objectionable because of the stepwhich necessarily results in the run-out surfaces leading'away from thedelivery end of the press. As the extruded shape is pushed forwardlyfrom the die the shape is hot and malleable to a degree approachinglimpness. Therefore, anything that obstructs or interferes with itssmooth and even progressis apt to cause the extruded work to bedeformed. This step, resulting from the prior art construction,introduces the danger of this trouble.

With the foregoing in mind, one of the objects of the present inventionis to provide an extrusion press runout table which provides for thenecessary clearance required by the die-holder carrier motion and which,at thesame time, provides a continuous surface, running forwardly fromthe delivery end of the press, which is free from the describedobjectionable step or other disited States Patent continuities in thesurface level such as might tend to impede or divert the forwardlytravelling extruded shape pushed from the press. It is, of course,desired to attain this objective in a manner permitting the use of theinvention in a practical manner with commercial extrusion presses. Otherobjects may be inferred from the following disclosure of a specificexample of an extrusion press run-out table incorporating the principlesof the invention.

This example is illustrated by the accompanying drawings in which:

Fig. 1 is a plan view;

Fig. 2 is a side view of Fig. 1 showing certain of the parts sectionedin a vertical longitudinal plane to clarify the construction;

Fig. 3 is a cross section taken on the line 33 in Fig. 2, this figureand the following figures being on an enlarged scale with respect to thescale used in Figs. 1 and 2;

Fig. 4 is a cross section taken on the line 44 in Fig. 2;

Fig. 5 is a cross section taken on the line 5-5 in Fig. 2;

Fig. 6 is a cross section taken on the line 6-6 in Fig. 2;

Fig. 7 is an enlarged section of Fig. 2 which shows the connectionbetween the die-holder carrier and the rear end of the run-out table;

Fig. 8 is a side view on the enlarged scale of Fig. 7 and showing thecentral portion of the run-out table, certain parts being sectioned on avertical plane; and

Fig. 9 is like Fig. 8 excepting that no parts are sectioned and it showsthe forward end of the run-out table which delivers the extruded work tothe longer run-out table provided in the plant by the purchaser of thepress.

As used herein, the terms forward, forwardly, rear, backwardly, and thelike, refer to portions of the equipment or directions of movement onthe basis that forwardly is the direction of movement of the extrudedshape during the extrusion operation.

These drawings show only the forward or delivery end ofa horizontalextrusion press such as is used to extrude aluminum and brass shapes andperhaps even steel shapes. The billet is charged in the unillustratedrear or breech end of the container 1. The die and die backer assembly 2seals against the forward end of the containers liner 3 by being pushedbackwardly thereagainst because this assembly is mounted by the dieholder 4 which is jammed backwardly by the wedge 5 which worksvertically in the platen 6 of the press. Extrusion is effected by theunillustrated ram which applies pressure to the rear end of the billetin the container liner 3 and causes the billet metal to extrudeforwardly through the die of the assembly 2, forwardly and away from thepress. The resulting shape must, of course, be conveyed away from thepress and this should be done as gently and as free from impedance as ispossible.

After the extrusion the wedge 5 is, of course, lifted to unlock theparts, and then the die holder 4 is pulled forwardly.

The, above action is made possible because the die holder 4 is connectedto the die-holder carrier 7 which is in turn connected, by a coupling 8,with the connecting rod 9 of a hydraulic reciprocating motor, this rod 9extending backwardly from a double acting hydraulic motor Iii) of thecylinder and piston type. The stroke of this motor is long enough topull the die-holder carrier and the various die parts forwardly farenough to permit the butt end to be severed from the balance of theextruded shape.

An elongated frame assembly 11 extends forwardly from the press andserves to mount the motor 10. This frame assembly also mounts guideways12 on which the die holder rides as it is carried forwardly by itscarrier upon a forward stroke by the motor 10, reverse action of themotor, of course, replacing the 'die holder, whereby the various dieparts, including the holder and its carrier, are reciprocative through apath which would be obstructed by any fixed run-out table. It is forthis reason that any run-out table used must be capable of reciprocatingwith the die holder and its carrier.

According to the present invention a run-out table is used which has arear section constituted by an elongated platform which reciprocateswith the die holder and its carrier, and a forward link belt sectionwhich is provided with means for diverting it from linear travel when itmoves forwardly with the platform section to provide clearance for theparts which must be moved from the delivery end of the press. Thisdiversion is elfected by looping the link belt section reversely so thatit extends reversely with respect to the balance of the table, and meansare provided for aligning the two sections, when they are run forwardly,so that then the table forms a run-out surface, for carrying the work,which is smooth and free from any step or other discontinuity.

This rear platform section is provided by two laterally spaced,horizontally extending beams 13 having their rear ends connected to thecoupling 8. Alternating plates 14 and rollers 15 extend transverselybetween these beams 13, the plates serving to strut the beams apart toform what is in effect a longitudinally extending bridge, and therollers 15 being journaled to turn and so that the rollers project veryslightly above the top surfaces of the plates 14. This entire structurereciprocates forwardly and backwardly with reciprocation of thedieholder carrier 7.

The forward section is formed by a link belt carrier comprising links 16having top surfaces horizontally registered with and aligned with thetops of the rollers 15 of the rear platform section, when the latter ismoved backwardly so that the carrier 7 has moved the die holder to theposition it occupies during extrusion. When in this position the linkbelt is supported by horizontal guides 17 which extend longitudinallywith respect to the table and are mounted between the side members ofthe frame assembly 11.

This link belt is made from fiat segments which are interconnected by asprocket chain 18. This chain is in the form of a loop to the upper spanof which the belt links 16 are fixed, the loop being endless andextending around a rear sprocket wheel 19 and a forward sprocket wheel20 respectively journaled by axles extending between the side members ofthe frame assembly 11. The rearmost link 16a of the belt is extendedbackwardly and connects with the forward end of the previously describedplatform section.

This new table, in operation, runs forwardly when the motor 10 ispowered to pull the die-holder carrier forwardly, after removal of thewedge at the end of an extrusion, the link belt section 16 runningaround the forward sprockets 20, doubling back on itself, and running ata lower level through the bottom stretch of the loop formed by thesprocket chains. Thus the link belt section is moved out of the way soas to permit the platform section to move forwardly as required to clearthe reciprocating path of the die-holder carrier.

After the die is cleared and the motor is operated to push back thedie-holder carrier 7 the platform and link belt run-out sections aligntheir top surfaces mutually, at the same level, due to the guides 17supporting the links 16, so that the extruded work is provided with acompletely level surface over which to run while being pushed from thepress. The motor 10 which is always required to reciprocate thedie-holder carrier, also serves to power the flexible table sectionformed by the link belt conveyor.

It is to be noted that the long table provided by the purchaser,generally indicated at 21, may be spaced very closely to the forward endof the link belt table section with its top surface at exactly the samelevel as the top surface of the run-out table described. Thus therun-out table structure provided by the press manufacturer cooperateswith the table structure provided by the purchaser, in the plant, toform a completely smooth run-out table surface for the work. At the sametime, the die-holder carrier is cleared by the working run-out tablewhenever necessary and in a practical and foolproof manner.

I claim:

1. A run-out table for an extrusion press having a reciprocativedie-holder carrier, said table comprising an elongated platform sectionextending forwardly from said press and having means for connecting itsrear end to said carrier, means for reciprocatively mounting saidplatform section for movement forwardly and backwardly with its top at afixed level supporting work extruded by said press, laterally spacedhorizontally elongated loops of sprocket chains having mounting sprocketwheels located to position said loops so that they extend forwardly fromthe forward end of said platform section, links extending transverselybetween said chains at the upper spans thereof to form a link-beltextending from one of said sprocket wheels to the other, means forconnecting the rear end of said link-belt to the forward end of saidplatform section, said sprocket wheels being positioned to locate theupper spans of said chains at levels substantially positioning the topof said linkbelt at said fixed level, said wheels rotating with forward-motion of said carrier and said platform section so that said link-beltruns around the forward ones of said sprocket wheels.

2. A run-out table for an extrusion press having a reciprocativedie-holder carrier, said table comprising an elongated platformextending forwardly from said press and having means for connecting itsrear end to said carrier, means for reciprocatively mounting saidplatform section for movement forwardly and backwardly with its top at afixed level supporting work extruded by said press, laterally spacedhorizontally elongated loops of sprocket chains having mounting sprocketwheels located to position said loops so that they extend forwardly fromthe forward end of said platform, links extending transversely betweensaid chains at the upper spans thereof to form a link-belt extendingfrom one of said Sprocket wheels to the other, means for connecting therear end of said link-belt to the forward end of said platform section,said sprocket wheels being positioned to locate the upper spans of saidchains at levels substantially positioning the top of said link-belt atsaidfixed level, said wheels rotating with forward motion of saidcarrier and said platform so that said link-belt runs around the forwardones of said sprocket wheels, and horizontal guide elements mountedbelow said link-belt to maintain a level surface over which work can runwhile being pushed from the press.

References Cited in the file of this patent UNITED STATES PATENTS535,534 Dollman Mar. 12, 1895 2,031,008 Schwerak Feb. 18, 1936 2,379,622Butler July 3, 1945 2,596,988 Katz May 20, 1952 FOREIGN PATENTS 559,450Great Britain Feb. 21, 1944 875,036 Germany Apr. 30, 1953

